1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa6155e8dee50ad2f7eccba8d30a9fe31e1e64a5c10247fe5ad62f5ec8c0d59. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21987f7a-1aaa-446a-a2df-ff751e616981.json and https://artists.proofprofile.net/proofs/artist/21987f7a-1aaa-446a-a2df-ff751e616981.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33f069e2669412ace551b9c29c55543f3df3ceb4fdc5774370a4851f1e316b7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX2046298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9aa055b9aa7079dfe8ea46e47f20331d1a5564736ee3562b59231b0704e3c8a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX2046299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b5470f13bc9e7a75a3ee5a8cfe19be798ad315c1ccb9a459f33dad921032c0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX2046303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7913ac3b7752299cb092e758bf34ddb3b6917d1143179b16b12f54c53642d16. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX2046304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eda5280a3775f9b0857f3ff3726331b5b0e642374dddc77d7728ae58a405bdf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX2046308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6b88df146a677cf1959bc1fb40bb6525400182e7607fa48a36a4e5a67275b9. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX2046288.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12302409303fe73d052a5af06d19162355a3707a614c668f76ca212145f1a9e. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX2046289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2adf46ec6a1471006334d5126a448a3bdf6b9f8b62d604ed6338dd15ef31778. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX2046291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70981cd0ab085cd8c84b0c5c8e5654e52adae2be7a43c307fb845066441b1bf. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX2046292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfb269d01c920b6177d51cdcc205a4f8f1e6be2c05918cdab67cfe7131b1431. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX2046293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb94f8f0350398a94ee8295c1eceb78aba6067862f28bd833dd7a78869a1c909. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX2046295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33269292459381751c8bfe62cc43e5dfeae5be0d1f4096386b006273211fd136. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM7281974728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230e2574e26e3811db180bdcb4ce2fd4cf88c5582be51a9122e4857e8c0a5acb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM7281974729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a9079048b18b96ca7e92f4f7bf7f492c22552ab61fb55421fa934b7f5472d8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM7281974736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ac8b1e76234fbad0d5f65d5a7fc91bdc41dbb0936c6b50bc60b249e209fa4f. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM7281974727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cc7388fcebde350473b831fca7f16d73de00f9ce7edceac9056e6de6fd775e. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM7281974730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f09aae788c340a1f0152de7a3c6a8e4c8a2411c0d35e4eccc6fe215d8586c5. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM7281974731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83db779a9a4a346456b4c19f2c36cdc4e29cf4220c33ba9d85e36155cf3151a. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM7281974732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84af74d1f0d83d10b159181dfedc7b34e1a2ec5c7f74109ddda589e387cfcae2. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM7281974733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc595ce06d8da0b193f1b0c7c9dc059bbdc49e945b449f65d9f0dee2bc07121. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM7281974734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddd57e037d31809e0fb6be7067cfeefbd2fc96049fe7e1f5db4a362ea30ca21. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMF1903180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc551677dff0d74bc72a4033053848fde58b37b905a35a600d0d332bbd74c165. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMF1903181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda24cc9c4e0c3b168ebaffca8f0b20f8d06180cfbf9e9c532f921926e0362321. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMF1903182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ada83aacc153a6ebf61879b2be7c63165d4cad596bffc02a0193fd57e5a6fd. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMF1903184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7a14f58e0caa9f2fff95200de196d2145e50a692e0559feccd685dfff03a2b. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMF1903187.